Ring traveler



ApYiE'ZZ, 1924. 91380 P. c. WENTWORTH RING TRAVELER FiledfMay 19, 1923 Patented Apr. 22, 1924.

1,491289 PATENT OFFICE.

I PHILIP C; ORTH, OF BHODE ISLAND.

nine TRAVELER.

Application filed May :19, 1923., Serial No. 640,251.

To all whom it may concern: 7

Be it known thatII. PHILI'P'C. .WEN'rimam, acitizen of the United States, residing at Providence, county of Providence, State of lRhode Island, have invented certain new and useful Improvements in Ring Traveiers, of which the following is a specification.

My present invention relates to ring'travele'rs and particularly to a hardened and tempered traveler in which there is great hardness at the hornsand a resiliency or spring temper in-the bows.

In my previous application Patent No; 1,461,059, the traveler therein, described as an illustrative embodiment and the method of-producing it dealt more particularly with travelers in which the amount of carbon was uniform or substantially uniform throughout, but the amount of converted carbon varied. In accordance. with my present invention I contemplate a traveler in whicha differential or variant temper or hardness is secured and in this class thetraveler has a difference between horns'and -bow in the amount of carbon in these respective parts. In this form of my invention there may or may not be a difference in the proportion between the hardening carbon and the cement carbon.'

As illustrative of my invention I shall describe a traveler in accordance with my invention and indicate briefly the'method of.

efi'ecting this variable carbonization. In

the drawings forming a part hereof I am of I necessity obliged to'resort to somewhat diagrammatic treatment. In thesedrawings Fig. 1 is a somewhat diagrammatic section through a traveler in accordance with my invention.

Figs. 2 to 5 are similar views showing successive stages in the method of hardening such a traveler, and

Fig. 6 is a diagrammatic indication of a mechanical hand-ling of the process.

My new traveler as heretofore .suggested has for its principal characteristic a varia tion of carbon content between the horns H and the bow B. This I have endeavored to illustrate diagrammatically in Fig. 1 in Y which the traveler T maybe considered as illustrated in diagrammatic,section to expose or make visible the aforementioned variation in the carbon content of its metal. The variations in heaviness of the section lines are intendedvtd represent variations in percentage of carbon in the metal of the traveler and not as in my priorPatent No.

1,461,059, a variation inthe proportion of the dissolved or hardening carbon. Again and to make this clear, in my said patent I was dealing with atraveler of substantial uniform carbon content throughoutbut variantly tempered so that the percentage of dissolved or hardening carbon to the cement carbon varied. In my present casethe actual amount of'carbon in the metal varies from the horns H up to the bow B. There may or may not be any variation in percentage of cement and hardening carbon as that is more or less immaterial in accordance with my present invention.

The traveler herein involved while having a similar characteristic hardness at the "horns and spring temper at the bow is distinguished by its actual variation of carbon content which is the principle involved in my present invention.

While my variant carbon traveler may be variously treated for production I have shown in Fi 6 as diagrammatic indication of the handling of the process a shallow tank 1 in which a molten bath 2 of any suitable.

carbonizing material such as a fusible carbonaceous compound, a cyanide, ferrocyanide or carbonate, either sodium or potassium. In this form the bath 2 is kept molten by the burners 3. The formed but uncarbonized travelers T which may be considered as made -'one by one by fingers 6 of a chain or belt 7 running over pulleys 8. The chain or belt 7 is given sufiioient slack to permit it to follow in substantial parallelism with the course of the guideway 45. The travelers are thus slowly propelled through the bath by. a gradual submersion and emersion until they come out over the end i where they automatically drop ofi.

I have endeavored to indicate by exponents for'the character I that the uncarbonized traveler T as indicated in Fig. 2 move down to the surface of the liquid and when thev begin to enter that surface take onjcarbon at their horns as'indicated at'T Fig. 3. As

they are advanced they reach a great depth as at T in Fig. 4 and gradually having been submerged at the central area of the tank emerge finally as T as indicated inFig.- 5 Which corresponds to thestate in Fig. 1.

Various modifications may be made in the method of progressively treating the travel-v erswith the carbon yielding medium whether it be molten or otherwise and the mechanical handling may be variously eifected. Various modifications thus made in accordance with the spirit of'myv'invention are tobe considered as included-thereby ifwithin the limits of the appended claims.

WVhat I therefore claim and desire to secure by Letters Patent is:

1. A hardened ring traveler of the class described comprisingva bow and terminal horns and having more carbon per'unit of cross section at the horns than at the bow.

2. A hardened ring traveler of the class described comprising a bow and terminal horns formed of low carbon metal and carbonized so as to have .more carbon per unit of crosssection' at the horns than at the bow.

3. A ring traveler of the class described comprising a traveler formed of low carbon.

metal and having a decreasing amount of carbon per unit of cross section from the horns towards the bow.

ifThe method of making a hardened ring traveler consisting in forming a traveler from stock of uniform low carbon content,- and'in treatingthe traveler so formed to;

introduce therein more carbon per unit of cross section at the horns than at the how.

.5. The method of making a hardened ring traveler consisting in forming a traveler from stock of uniform low carbon content,

and in treating the traveler so formed to introduce therein progressively decreasing from the horns towards the bow.

amounts of-carbon per unitof cross section,

'6. That step in the method of making a iv hardened ring travelerwhich consists in in troducingfinto a piece of stock of uniform low carbon content more carbon per unit of cross section at the horns than at the bow.

7. That step in the method of making a hardened ring traveler which consists in introducing into a piece of stock of uniform low carbon content progressively decreasing amounts of carbon per unlt of cross section from the horns towards the bow.

8.'That step inthe method of making a 

